Answer:
I think It is 4 hours
Explanation:
because 22 - 16.5 =5.5 in one hour they can 5.5 miles. so 5.5 x 4 = 22
so 4 hours should be the answer.
2 hours- 5 miles, 6 miles, 13 miles
3 Hours- 7.5, 9, 9.5
4 hours- 10, 12, 6
I think it might be wrong but I did my best sorry!
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